Fuser Section - Kyocera KM-3050 Service Manual

2-1-7

Fuser section

The fuser section consists of the parts shown in Figure 2-1-21. When paper reaches the fuser section after the transfer
process, it passes between the press roller and heat roller, which is heated by fuser heaters M or S (FH-M or FH-S). Pres-
sure is applied by the fuser unit pressure springs so that the toner on the paper is melted, fused and fixed onto the paper.
The heat roller is heated by fuser heaters M or S (FH-M or FH-S) inside it; its surface temperature is detected by the fuser
unit thermistor 1 and 2 (FTH1/2), and is regulated by the fuser heaters turning on and off.
If the fuser section becomes abnormally hot, fuser unit thermostat 1 and 2 (FTS1/2) operates shutting the power to the
fuser heaters off. When the fusing process is completed, the paper is separated from the heat roller by its separation claws
and is conveyed from the machine to eject and switchback section.
PSPWB
Figure 2-1-21 Fuser section
YC5-3
YC5-1 ILSW
YC5-2
Figure 2-1-22 Fuser section block diagram
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10) Fuser unit thermistor 2 (FTH2)
(11) Press roller
(12) Press roller separation claw
FTS2 FTS1
Heat roller
EPWB
2GN/2GP/2GR
Upper fuser unit cover
Fuser housing
Heat roller
Heat roller separation claw
Fuser heater M (FH-M)
Fuser heater S (FH-S)
Fuser unit thermostat 1 (FTS1)
Fuser unit thermostat 2 (FTS2)
Fuser unit thermistor 1 (FTH1)
FTH2
FTH1
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